Abstract
The water oxidation that occurred at the anode is related to various renewable energy systems, and the electrode structure and morphology play a significant impact in its catalytic performance. In this work, we report a handy electrodeposition technique to incorporate CoP on a three-dimensional (3D) CuO microflower to construct a hierarchically structured anode (denoted as CuO-FR@CoP) for efficient oxygen evolution reaction. Resulting from the large quantity electroactive sites provided by the hierarchically interconnected 3D configuration and the intense electronic interactions between CuO core and CoP shell, the anode shows superior activity and stability in alkaline environment with a low Tafel slope (56 mV dec–1); the overpotentials are only 290 and 330 mV respectively to drive the 50 and 300 mA cm–2 current densities. The bulk electrolysis shows that the CuO-FR@CoP material is capable of maintaining a stable current density of 56 mA cm–2 for at least 30 h, giving rise to a high Faraday efficiency of ...
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